Coal-screen.



PATENTED JAN. 30, 1906.

E. R. DIQKEY, GOAL SCREEN.

APPLIOATION FILED OUT. 31, 1904.

owznfoz tion to the horizontal throughout its length,-

'Unrrsnn sriirns Pr TENT orriois.

Specification of Letters Patent.

Patented Jan. 30, 1906.

Application filed October 31,1904. Serial No. 230.813.

To aid whom it may concern:

Be it known that I, ELZA R. DiOKEY, e citizen of the United States, residing at Bugger,

in the county of Sullivan and State of Indione, have invented certain new and useful improvements in Coal-Screens, ofwhich the following is e specification.

This invention provides a screen of novel lbrmation, designed chiefly for sifting coal, crushed coke or stone, or other material, the' screen being of such construction as to positively feed the material thereover by a step by-step movement and to fold to admit of its occupying at small space when not reuired. for immediate use.

l! or a full description of the invention and. the merits thereof and I also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and accompanying drawings.

Nhile the invention maybe adopted to dif- .icrcnt forms and COIldltlOllS by changes in the structure and minor details without deporting from the spirit or essential features thereof,st1ll the preferred embodiment thereof is shown in the accompanying drawings, in which v Figure 1 is :1- side View of o screcn embodying the invention, the legs being shown eX- tended by full lines and infolded position by dotted lines. Fig. 3 is a top plan view thereof. Fig. 3 is o longitudinal. section of the screen in front of a movable bar. Fig. i is a view similar to Fig. 2, taken on e. line so as to disclose a stationary bar. Fig. 5 is 'a transvcrse section of the screen. Corresponding endlilre ports are reterre to in the following description and indicated. in all the views of the drawings by the some reference characters. 1

The frame for supporting the screen elements and actuating mechanism comprises side pieces 1 and transverse bars 2; The parts 1 and 2 may be of metal or wood or other material and rigidly connected so to provide a frame of substantial.- structure. The frame is'supported by means of folding legs 3 end 4 of such relative length as to cause the screen to assume e slight inc-line,-

whereby' the feed of the material thereover is :ZtSSlS'tGd by gravity. The long legs '3 are at. the receiving end of the screen. The legs are oppositely inclined when extended, so as to prevent longitudinal movement of the screen when in operation. The legs are piv otolly connected at their upper ends to the side pieces 1, and each is formed with a shoulder 5 to engage with on edge portion of the side pieces and limit the movement of the legs when unfolded. The legs are preferably formed of metal 'bars'flenged along one edge, on edge portion of the flange being cut away to form the shoulder 5, and the flanges engaging With'the lower edges of the side pieces when the legs are folded.

A compound crankbelt 6 is arranged at thereceiving end of the frame and is sdapted to, be driven either by hand or other suitable power. A rod 7 is located at the opposite end of the frame, both parts 6 and 7 being supported in the side pieces 1. The movable screen elements are supported at one end bvmesns of the crank-shalt 6 and otthe opposite end by the rod 7.

The screen elements comprise stationary bars 8 and movable bars 9 alternately zirranged so theta stationery bar is located between adjacent'movsble bars, and vice verse.

Each stationary bar has one end curved, as

' shown at 10, and epertured to receive a lostening 11, by means of which it is attached to a transverse bin 2, end the opposite end is formed with it longitudinal slot 12 for reception of the rod 7. The movable bars .9 have inclined slots 13 at one end to receive the rod 7, end the opposite end journaled to the respective crank portions of the shaft 6. Wasln ers 14 are strung upon the rod 7 between the lower end portions of the bars 8 end 9 to properly space the some. The bars are of e them when the'screen is in operation. upper edges of the bars are toothed, the upper edges of the teeth inclining toward the receiving end of the screen to admit of-the material freely riding over the teeth during the screening operation. By having the slots 13 inclined upwerd :tndrezrrward the Width to prevent any material passing under I The movable members receive on upwmd tends ency upon their downstroke and. a. falling ,movement upon their upward or return stroke, whereby their teeth are enabled. to clear the material upon the return stroke of the bars 9 endto engage with said material upon the forward stroke of said bars, thereby producing the intermittent or step-by-step 2 e a 1 2.. A coal-screen ccmpiiising sidepiece motion. f :Theevm1' bars: are? tfiin 'svei'sely spaced to' provide for escape of dust endfine material.

Having thus described tli invention; v vhat is claimed as new isa 1. A coal-screen comprising a frame 'pr0-' vided with sifting mechanism, and legs pive" ota'll'y cennecteil to' thesides of thefname end of unequal length to'- give, anvinclinatipnitn the screen, and having longitudinal edge p r i ns ent to .,p .de a g i9. engag with the -lower edges oi thei screen frame sides to limit v the fcldingpf said,.legs; when turned up'against theusidesf 9i thefxarne; the ends vof the flanges v suijaeent th Ir pivetal, ends l mcining stop-should SIEQ, n

the. lower edge pOIftlQnSjQi; he, 31d pieces Off the frametelimit' the :znovemen whenunfolded, substantially as set Witnesses;

tzzinsveise eenjnectin'g liars; a1 'iin'sverse rod Tat one end oi the frame, longitudinal bars 8 transversely spaced and having slots at one end he receive-thered7 and having their 0pposite ends deflected downwardly and secured to an end bar of ,the frame op osite to the rod 7, a conlpoiiind ciank-s, aft and oth'enlongitudinal bars 9 arranged Let-Ween the .barsfiandl avmg inclined slots at one end to receive the rod 7 and having their opposite ends incunted uponthe cl-aiikpei tions vof saiderank-shaft gtheupper edgesef the ba sS and 9 beingt qotl edq,v .f I i In testn' en y -whp reof Iafiiz; nay e gnetui e inpresence cf twn witnesses, geeewv -t a ELZA? DICKEYQ a 5.1"

j D me 'BREW 

